Extended network via hydrogen bond linkages of coordination compounds: synthesis, crystal structure and thermal behaviour of the complexes [M(L)(2)(NO3)(2)] (M-II = Cu, Co) and [Ni(L)(2)(H2O)(2)][(NO3)(2)] (L = malonamide)

摘要

A series of monomeric complexes of general formula [M-II(L)(2)(NO3)(2)] (M-II = Cu, Co) (1), (2, 3), and [N-II(L)(2)(H2O)][(NO3)(2)] (4) with L = malonamide have been isolated and characterized by single crystal X-ray structure, The crystalline structures for all compounds show multi-dimensional arrays or networks structures created by two types of hydrogen-bonding interactions. The first, between hydrogen atoms of the amide moiety and oxygen atoms of malonamide N-H-(malonamide)...O-(malonamide) forming two-dimensional arrays. The second type, between the hydrogen atoms of the amide moiety and the oxygen atoms of the nitrate molecules N-H-(malonainide)...O-(nitrate) generating three-dimensional arrangements. Nevertheless, for the Ni compound two contacts between the oxygen atoms of water molecules and oxygen atoms of nitrate moiety O-(water)...O-(nitrate) are present too. All the compounds have been characterized through thermogravimetric (TG) and calorimetric analyses (DSC). (C) 2002 Elsevier Science B.V. All rights reserved. [References: 35]